Should work fine for the most part. Phil Wood says they won't warranty their hubs using a FW on fixed threading but I have 2,000 miles on this setup with zero issues. Your chainline may be slightly off due to the WI FW, in which case using square taper cranks would give you BB options to dial in your chainline. Scrod may be able to weigh in here.

EDIT:

Also, this page here is an amazing reference:
http://sheldonbrown.com/chainline-single.html